Connecticut residents who own guns categorized as assault weapons under firearm regulations have until the end of the month to register the weapons with the state before risking felony charges in some cases.

The registration requirement was included in gun control regulations approved in April as part of a state response to the Sandy Hook Elementary School shooting. The law expanded the number of firearms prohibited in Connecticut and banned the sale of ammunition magazines that carry more than 10 rounds.

Although the law did not require gun owners who had previously purchased the weapons and magazines to get rid of them, it did require them to register the equipment with the state. The deadline for declaring the guns and high capacity magazines is Jan. 1.